Table of Contents
Antivirus and Preventative Protection
Do not have more than one antivirus application installed at a time on your PC. If you decide to switch from one to another, you must uninstall the one you have before you install the other one.
Very effective but tends to be noisy (literally) with maintenance. Don't be surprised to hear your PC say, "Virus database has been updated." (Or, if you choose Pirate Talk as its default language, "Avast, me hearties! Your blacklist of dangerous sea dogs be safely aboard.")
Annual registration is required for the free edition.
Hitchhikers and unwanted features: The Google Chrome browser is bundled, the Google Toolbar for Internet Explorer is bundled, and the Grime Fighter feature refuses to act or show alleged "grime" without an extra purchase. Uncheck their checkboxes and choose custom installation to opt out of them.
Malicious Software Clean-Up
These are tools you should run if you have malicious software installed and trying to use the Control Panel fails to remove them all.
Malwarebytes' Anti-Malware (MBAM)
Use caution with the installer. If you want the free edition, then you must opt out of the free trial of Malwarebytes Anti-Malware Premium on the installer's final page.
A simple run-once tool that cleans up malicious files, folders, toolbars, and browser extensions.
Web Browser Extensions
Revoke temporary permissions to undo every temporary choice since Firefox was opened.
If you temporarily allow a domain and want to permanently allow it, forbid it first, then allow it.
Wanted for this list
PGP and GnuPG software and especially introductory how-tos that establish good security practices. Enigmail for Thunderbird?
Disk encryption software for Windows, now that TrueCrypt has been compromised?